Electronic device including protective hinge structure preventing foreign matter from entering electronic device

ABSTRACT

Disclosed is an electronic device including a first housing, a second housing, a display disposed on the first housing and the second housing, a first hinge plate coupled to the first housing, a second hinge plate coupled to the second housing, and at least one hinge structure coupled to the first hinge plate and the second hinge plate, wherein the at least one hinge structure comprises a center bracket, a first hinge bracket coupled to the center bracket and configured to rotate in a first direction, a second hinge bracket connected to the center bracket and configured to rotate in a second direction, and at least one hole formed in the center bracket.

CROSS-REFERENCE TO RELATED APPLICATION(S)

This application is a Continuation Application of U.S. patentapplication Ser. No. 16/865,634 filed on May 4, 2020, which is based onand claims priority under 35 U.S.C. § 119 to Korean Patent ApplicationNo. 10-2019-0074428, filed on Jun. 21, 2019 and Korean PatentApplication No. 10-2019-0062850, filed on May 29, 2019, in the KoreanIntellectual Property Office, the disclosures of each of which beingincorporated herein by reference in their entireties.

BACKGROUND 1. Field

The disclosure relates generally to an electronic device, and moreparticularly, to an electronic device including a hinge structure.

2. Description of Related Art

Portable electronic devices such as smartphones may provide variousfunctions, such as telephone call, video playback, and Internet searchfunctions, based on various types of applications. Recently, variousforms of foldable electronic devices have been developed to create awider screen while maintaining portability.

Conventional foldable electronic devices include a plurality of housingsby which a display is foldable in a predetermined direction, and employa hinge structure connecting the housings. A space is formed between thehousings and the hinge structure in a process of disposing the housingsand the hinge structure, causing foreign matter to be introduced intothe foldable electronic device through the space. The foreign mattertends to adversely influence operation of electronic parts in thefoldable electronic device, or may affect hinge motion of the hingestructure. For example, when the conventional foldable electronic deviceperforms a hinge motion when specific foreign matter is on a rearsurface of the display, the foreign matter tends to cause a malfunctionin the display.

As such, there is a need in the art for a method and apparatus thateliminate the propensity for foreign matter to be introduced into thedisplay of the foldable electronic device.

SUMMARY

Aspects of the disclosure are to address at least the above-mentionedproblems and/or disadvantages and to provide at least the advantagesdescribed below. Accordingly, an aspect of the disclosure is to providean electronic device including a hinge structure that employs astructure for preventing introduction of foreign matter into theelectronic device

Another aspect of the disclosure is to provide an electronic deviceincluding a hinge structure that is capable of suppressing movement offoreign matter to prevent the foreign matter from adhering to parts ofor moving parts around the electronic device.

In accordance with an aspect of the disclosure, an electronic deviceincludes a first housing, a second housing, a display disposed on thefirst housing and the second housing, a first hinge plate coupled to thefirst housing, a second hinge plate coupled to the second housing, andat least one hinge structure coupled to the first hinge plate and thesecond hinge plate, wherein the at least one hinge structure comprises acenter bracket, a first hinge bracket coupled to the center bracket andconfigured to rotate in a first direction, a second hinge bracketconnected to the center bracket and configured to rotate in a seconddirection, and at least one hole formed in the center bracket.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other aspects, features, and advantages of certainembodiments of the disclosure will be more apparent from the followingdescription taken in conjunction with the accompanying drawings, inwhich:

FIG. 1A illustrates the front exterior of a foldable electronic devicein a first state according to an embodiment;

FIG. 1B illustrates the rear exterior of the foldable electronic devicein the first state according to an embodiment;

FIG. 1C illustrates the exterior of the foldable electronic device in asecond state according to a first embodiment;

FIG. 1D illustrates the exterior of the foldable electronic device inthe second state according to a second embodiment;

FIG. 2 illustrates an exploded perspective view of the foldableelectronic device according to an embodiment;

FIG. 3 illustrates a state in which some components of the foldableelectronic device illustrated in FIG. 2 are coupled, according to anembodiment;

FIG. 4 illustrates examples of a hinge module and a hinge housingaccording to an embodiment;

FIG. 5 illustrates a first hinge structure or a second hinge structureaccording to an embodiment;

FIG. 6 illustrates a modified example of the first hinge structure orthe second hinge structure according to an embodiment;

FIG. 7 illustrates some components of the electronic device on which ismounted the modified first or second hinge structure, according to anembodiment;

FIG. 8 illustrates a modified example of a third hinge structureaccording to an embodiment;

FIG. 9 illustrates some components of the electronic device on which ismounted the modified third hinge structure according to an embodiment;

FIG. 10 illustrates one of cross-sections of modified forms of the hingestructures according to an embodiment;

FIG. 11A illustrates an exploded perspective view of the third hingestructure of the foldable electronic device according to an embodiment;

FIG. 11B illustrates the third hinge structure of the foldableelectronic device in a flat state according to an embodiment;

FIG. 11C is a sectional view of the third hinge structure taken alongline A-A′ of FIG. 11B;

FIG. 11D is a sectional view of the third hinge structure taken alongline B-B′ of FIG. 11B;

FIG. 11E is a sectional view of the third hinge structure taken alongline C-C′ of FIG. 11;

FIG. 12 illustrates a detent structure according to an embodiment;

FIG. 13 illustrates an arrangement of foreign matter collection membersaccording to a first embodiment;

FIG. 14A illustrates an arrangement of foreign matter collection membersaccording to a second embodiment; and

FIG. 14B is a sectional view taken along line D-D′ of FIG. 14A.

DETAILED DESCRIPTION

Embodiments of the disclosure will now be described with reference toaccompanying drawings, Accordingly, those of ordinary skill in the artwill recognize that modifications, equivalents, and/or alternatives onthe embodiments described herein can be made without departing from thescope and spirit of the disclosure. With regard to description ofdrawings similar components may be marked by similar reference numerals.Descriptions of well-known functions and/or configurations will beomitted for the sake of clarity and conciseness.

Expressions such as “have”“may have”, “include” and “comprise”, or “mayinclude” and “may comprise” used herein indicate existence ofcorresponding components such as numeric values, functions, operations,or parts, but do not exclude presence of additional features,

The expressions “A or B”, “at least one of A or/and B”, or “one or moreof A or/and B”, and the like may include any and all combinations of oneor more of the associated listed items. For example, the expressions “Aor B”, “at least one of A and B”, and “at least one of A or B” may referto at least one of (1) where at least one A is included, (2) where atleast one B is included, and (3) where both of at least one A and atleast one B are included.

Terms, such as “first” and “second” used in the disclosure may be usedto refer to various components regardless of the order and/or priorityand to distinguish the relevant components from other components, but donot limit the components. For example, “a first user device” and “asecond user device” indicate different user devices regardless of theorder or priority. A first component may be referred to as a secondcomponent, and similarly, a second component may be referred to as afirst component.

It will be understood that when a first component is referred to asbeing operatively or communicatively coupled with/to or connected toanother component, such as a second component, the first component maybe directly coupled with/to or connected to the second component or anintervening third component may be present. In contrast, when the firstcomponent is referred to as being directly coupled with/to or directlyconnected to the second component, it should be understood that there isno intervening third component present.

The expression “configured to” used in the disclosure may be used as theexpression “suitable for”, “having the capacity to”, “designed to”,“adapted to”, “made to”, or “capable of”, depending on the situation.The term “configured to” may indicate “specifically designed to” inhardware, and “a device configured to” may indicate that the device iscapable of operating together with another device or other parts. Forexample, a “processor configured to (or set to) perform A, B, and C” mayindicate an embedded processor for performing a corresponding operationor a generic-purpose processor (e.g., a central processing unit (CPU) oran application processor (AP)) which performs corresponding operationsby executing one or more software programs stored in a memory device.

Terms used in the disclosure are used to describe embodiments and arenot intended to limit the scope of the disclosure. Terms of a singularform may include plural forms unless otherwise specified. All the termsused herein, which include technical or scientific terms, may have thesame meaning that is generally understood by a person skilled in theart. Terms which are defined in a dictionary and commonly used shouldalso be interpreted as is customary in the relevant related art and notin an idealized or overly formal unless expressly so defined inembodiments of the disclosure. In some cases, even terms defined in thedisclosure may not be interpreted to exclude embodiments of thedisclosure.

An electronic device herein may include at least one of smartphones,tablet personal computers (PCs), mobile phones, video telephones,electronic book readers, desktop PCs, laptop netbook computers,workstations, servers, personal digital assistants (PDAs), portablemultimedia players (PMPs), motion picture experts group (MPEG-1 orMPEG-2) audio layer 3 (MP3) players, mobile medical devices, cameras, orwearable devices. The wearable device may include at least one of anaccessory type (e.g., watches, rings, bracelets, anklets, necklaces,glasses, contact lens, or head-mounted-devices (HMDs)), a fabric orgarment-integrated type (e.g., an electronic apparel), a body-attachedtype (e.g., a skin pad or tattoos), or a bio-implantable type (e.g., animplantable circuit) of wearable device.

Hereinafter, the term “user” may refer to a person who uses anelectronic device or to an artificial intelligence electronic devicethat uses the electronic device.

FIG. 1A illustrates the front exterior of a foldable electronic devicein a first state according to an embodiment. FIG. 1B illustrates therear exterior of the foldable electronic device in the first stateaccording to an embodiment. FIG. 1C illustrates the exterior of thefoldable electronic device in a second state according to a firstembodiment. FIG. 1D illustrates the exterior of the foldable electronicdevice in the second state according to a second embodiment.

Referring to FIGS. 1A, 1B, 1C and 1D, the electronic device or thefoldable electronic device 100 (hereinafter, referred to as the foldableelectronic device) according to one embodiment may include a housing 120including a first housing structure 121 and a second housing structure122, a display 110 (e.g., a flexible display), a first cover 161, asecond cover 162, a hinge housing 150 having a hinge structure disposedtherein, and a sensor module 190, FIGS. 1A and 1B illustrate a frontsurface and a rear surface of the foldable electronic device 100 in thefirst state (e.g., a flat state or an unfolded state), and FIGS. 1C and1D are perspective views including upper and lower surfaces (or left andright surfaces) of the foldable electronic device 100 in the secondstate (e.g., a folded state).

Depending on an arrangement, the first housing structure 121 may bedisposed so as to be continuous with the second housing structure 122(e.g., when a central portion of the display 110 is unfolded to be flator when the housing 120 is in a flat state), or may be disposed side byside with the second housing structure 122. Alternatively, when thecentral portion of the display 110 is folded, one surface of the firsthousing structure 121 may face one surface of the second housingstructure 122.

At least part of the first housing structure 121 may be formed of ametallic material or a non-metallic material. For example, the firsthousing structure 121 may be formed of a material having a predeterminedstiffness to support at least part of the display 110. One area (or afirst portion) of the display 110 may be disposed on a portion of afront surface of the first housing structure 121. At least a portion ofthe first housing structure 121 may have an empty space to mountelectronic elements (e.g., printed circuit board or battery) or may becoupled with the first cover 161 to form an empty space. Electroniccomponents, such as a printed circuit board (PCB), and components, suchas at least one processor, at least one memory, and a battery, which aremounted on the PCB that are required to drive the display 110, may bedisposed in the empty space. The periphery of the first housingstructure 121 may be provided in a form that surrounds a periphery onone side of the display 110.

Depending on an arrangement, the second housing structure 122 may bedisposed side by side with the first housing structure 121, or may bedisposed such that at least one surface of the second housing structure122 faces one surface of the first housing structure 121 on which thedisplay 110 is disposed. The second housing structure 122 may be formedof the same material as that of the first housing structure 121. Thesecond housing structure 122 may be disposed to be horizontally orvertically symmetric to the first housing structure 121, and at leastpart of the remaining area of the display 110 other than the areadisposed on the first housing structure 121 may be disposed andsupported on a front surface of the second housing structure 122.Similar to the first housing structure 121, the second housing structure122 may include an empty space or may be coupled with the second cover162 to form an empty space, and electronic components required to drivethe display 110 may be disposed in the empty space. The periphery of thesecond housing structure 122 may be provided in a form that surrounds aperiphery on an opposite side of the display 110.

The foldable electronic device 100 may include, on one side of thesecond housing structure 122, a sensor arrangement area 123 in which atleast one sensor associated with operating a specific function of thefoldable electronic device 100 is disposed, such as a proximity sensor,an illuminance sensor, an iris sensor, an image sensor (or a camera),and/or a fingerprint sensor. The sensor arrangement area 123 may belocated on the rear surface of the foldable electronic device 100 whenthe at least one sensor is disposed on the rear surface of the foldableelectronic device 100.

Depending on a folded or flat state of the foldable electronic device100, the hinge housing 150 may be hidden by one side of the firsthousing structure 121 and one side of the second housing structure 122(e.g., a flat or unfolded (open) state of the housing 120), or may beexposed to the outside (e.g., a folded (closed) state of the housing120). For example, as illustrated in FIGS. 1A and 1B, the hinge housing150 may be hidden by the first housing structure 121 and the secondhousing structure 122 when the first housing structure 121 and thesecond housing structure 122 are disposed side by side. As illustratedin FIGS. 1C and ID, the hinge housing 150 may be exposed to the outsidefrom between lateral portions of the first housing structure 121 and thesecond housing structure 122 when the one surface of the first housingstructure 121 and the one surface of the second housing structure 122face each other.

At least part of the display 110 may be foldable. The display 110 mayinclude a first area disposed on the first housing structure 121, asecond area disposed on the second housing structure 122, and a centralarea within a predetermined range with respect to the area to which thefirst housing structure 121 and the second housing structure 122 areadjacent. At least part of the central area may be flexible.

The sensor module 190 may be disposed on a predetermined area of therear surface of the foldable electronic device 100. The sensor module190 may include at least one of an image sensor, an illuminance sensor,a heart rate sensor, and a fingerprint sensor. It is illustrated that aplurality of image sensors are disposed. However, the disclosure is notlimited thereto. The sensor module 190 may include a light emittingdevice (e.g., a lamp or a light-emitting diode (LED)) that may provide aflash function.

FIG. 2. illustrates an exploded perspective view of the foldableelectronic device according to an embodiment.

Referring to FIG. 2, the foldable electronic device 100 may include thedisplay 110, the housing 120, and components including a first PCB 131,a second. PCB 132, a first battery 133, a second battery 134, hingeplates 141 and 142, a hinge module 200, the first cover 161, the secondcover 162, and foreign matter (e.g., particles, dust, or a foreignsubstance) collection members 501, 502 503, 504, 521, and 522.

The display 110 may include a first area 51, a second area 52, and acentral area 53. The central area 53 may include a predetermined arealocated on a central portion of the inside of the display 110 while thedisplay 110 is folded, At least part of the first area 51 may he fixedlyattached to the first housing structure 121. At least part of the secondarea 52 may be fixedly attached to the second housing structure 122. Inthis regard, an adhesive member may be disposed between the first area51 of the display 110 and the first housing structure 121 and betweenthe second area 52 of the display 110 and the second housing structure122. The central area 53 may be disposed so as not to be fixed (orattached) to the first housing structure 121 and the second housingstructure 122. Accordingly, while the display 110 is folded or unfolded,the central area 53 may be moved because the central area 53 is notattached to the first housing structure 121 and the second housingstructure 122. In a folded state, a predetermined gap may be formedbetween at least part of the central area 53 and the hinge module 200.

The first housing structure 121 may include a first surface 121 a and asecond surface 121 b opposite to the first surface 121 a, and the secondhousing structure 122 may include a third surface 122 a and a fourthsurface 122 b opposite to the third surface 122 a. The first housingstructure 121 and the second housing structure 122 may be folded orunfolded about the hinge module 200 within a specified angle range. Whenthe display 110 is folded (or, when the first housing structure 121 andthe second housing structure 122 are vertically disposed side by side orrelatively wide surfaces are stacked), the third surface 122 a may facethe first surface 121 a, and when the display 110 is flat, the firstsurface 121 a and the third surface 122 a may face the same direction.

A first peripheral portion 121 c of the first housing structure 121 maybe connected with a second peripheral portion 122 c of the secondhousing structure 122 through the hinge module 200. The display 110 (orthe flexible display layer) may be disposed across at least part of thefirst surface 121 a and at least part of the third surface 122 a. Thedisplay 110 may be folded at or in areas adjacent to the firstperipheral portion 121 c and the second peripheral portion 122 c. Thesensor arrangement area 123 may be disposed on one side of the secondhousing structure 122.

The first PCB 131 may be disposed between the second surface 121 b ofthe first housing structure 121 and the first cover 161. The second PCB132 may be disposed between the fourth surface 122 b of the secondhousing structure 122 and the second cover 162. Alternatively, the firstPCB 131 and the second PCB 132 may be integrated into one PCB and may bedisposed between the second surface 121 b of the first housing structure121 and the first cover 161 or between the fourth surface 122 b of thesecond housing structure 122 and the second cover 162. Variouselectronic components required to drive the foldable electronic device100 may be disposed on the first PCB 131 and the second PCB 132. Forexample, components, such as a memory, at least one processor,communication circuitry, an antenna, a microphone, a speaker, at leastone sensor and an electronic component associated with driving thesensor, and a camera, may be mounted on at least one of the first PCB131 and the second PCB 132.

The first battery 133 may be disposed between the second surface 121 bof the first housing structure 121 and the first cover 161. The secondbattery 134 may be disposed between the fourth surface 122 b of thesecond housing structure 122 and the second cover 162. The first battery133 and the second battery 134 may supply power required to drive thefoldable electronic device 100. The first battery 133 and the secondbattery 134 may supply power to components, such as at least one of thefirst PCB 131 and the second PCB 132, the display 110, and at least onesensor, through wiring. Although it has been described that the foldableelectronic device 100 includes the plurality of batteries, thedisclosure is not limited thereto. For example the foldable electronicdevice 100 may include only one battery.

The hinge plates 141 and 142 may include the first hinge plate 141coupled with the first housing structure 121 and one side of the hingemodule 200 and the second hinge plate 142 coupled with the secondhousing structure 122 and an opposite side of the hinge module 200. Forexample, one side of the first hinge plate 141 may be fixed to theperiphery of the first housing structure 121 that is adjacent to thesecond housing structure 122, and an opposite side of the first hingeplate 141 may be fixed to portions of hinge structures 200 a, 300, and200 b and at least one detent structures 400 a, 400 b, 400 c, or 400 dthat are included in the hinge module 200.

The detent structures 400 a, 400 b 400 c, and 400 d, which aremechanical apparatuses, may temporarily stop rotary motion of thefoldable electronic device 100 or may stop rotary motion of the deviceat a specified pressure or less and allow rotary motion of the device atmore than the specified pressure. The detent structures 400 a, 400 b,400 c, and 400 d may enable a mounting function at a specified angledepending on hinge motions of the first housing structure 121 and thesecond housing structure 122. For example, when the internal anglebetween the first housing structure 121 and the second housing structure122 reaches a predetermined angle, the detent structures 400 a, 400 b,400 c, and 400 d may stop rotation of the first housing structure 121and the second housing structure 122, and when a specified force or moreis applied, the detent structures 400 a, 400 b, 400 c, and 400 d mayallow the first housing structure 121 and the second housing structure122 to be unfolded with the specified angle in a folded or folded withthe specified angle in a flat state. Accordingly, while a user folds orunfolds the first housing structure 121 or the second housing structure122, the force applied to fold or unfold the housing structures 121 and122 may be transmitted to at least parts of the hinge structures 200 a,200 b, and 300 and at least parts of the detent structures 400 a, 400 b,400 c, and 400 d.

One side of the second hinge plate 142 may be fixed to the periphery ofthe second housing structure 122 that is adjacent to the first housingstructure 121, and an opposite side of the second hinge plate 142 may befixed to the remaining portions of the hinge structures 200 a, 300, and200 b and the detent structures 400 a, 400 b, 400 c, and 400 d that areincluded in the hinge module 200. Accordingly, the force (or pressure)applied to fold or unfold the first housing structure 121 or the secondhousing structure 122 may be transmitted to at least the remaining partsof the hinge structures 200 a, 200 b, and 300 and the detent structures400 a, 400 b, 400 c, and 400 d.

The hinge module 200 may include the hinge housing 150, the first hingestructure 200 a, the second hinge structure 200 b, the third hingestructure 300, the detent structures 400 a, 400 b, 400 c, and 400 d, andthe foreign matter collection members 501, 502, 503, 504, 521, and 522.At least some of the foreign matter collection members 501, 502, 503,504, 521, and 522 may include an adhesive material capable of collectingforeign matter introduced or flowing into the foldable electronic device100. Alternatively, at least some of the foreign matter collectionmembers 501, 502, 503, 504, 521, and 522 may include an electrifiedmaterial or an elastic material that is capable of adsorbing introducedforeign matter (e.g., dust, small sand, or the like).

The hinge housing 150 may have a semi-cylindrical shape (or the shape ofa container with a semi-elliptical cross-section) that is closed atopposite ends. The hinge housing 150 may include an empty space in whichthe first hinge structure 200 a, the second hinge structure 200 b, thethird hinge structure 300, and the detent structures 400 a, 400 b, 400c, and 400 d are mounted. The hinge housing 150 may have a length thatcorresponds to the length of the display 110 in the direction of oneaxis (e.g., a longitudinal axis) or the length of the first housingstructure 121 in the direction of one axis (e.g., a longitudinal axis).The hinge housing 150 may have a semi-circular, semi-elliptical, orpartially-curved cross-section. The hinge housing 150 may include atleast one boss 151 (e.g., a protrusion for screw coupling) that is usedto mount and fix at least one of the hinge structures 200 a, 200 b, and300 and the detent structures 400 a, 400 b, 400 c, and 400 d. Theforeign matter collection members 521 and 522 may be disposed on atleast parts of the inside of the hinge housing 150. The foreign mattercollection members 521 and 522 may collect foreign matter introducedinto the foldable electronic device 100 and may suppress a movement ofthe foreign matter. The foreign matter collection members 521 and 522may be provided in the form of a tape, liquid, or a gel and may beapplied to predetermined areas of the inside of the hinge housing 150.

The first hinge structure 200 a may be disposed at one point of thehinge housing 150 that is symmetric to the second hinge structure 200 bwith respect to a central portion of the hinge housing 150. For example,the first hinge structure 200 a may be disposed to be biased to an upperside with respect to the central portion of the illustrated hingehousing 150. The first hinge structure 200 a may be disposed adjacent toan upper end of the hinge housing 150. A portion of the first hingestructure 200 a may be fixed to the hinge housing 150, and otherportions of the first hinge structure 200 a may be coupled to the hingeplates 141 and 142. For example, one side of the first hinge structure200 a may be coupled with one side of the first hinge plate 141, and anopposite side of the first hinge structure 200 a may be coupled to oneside of the second hinge plate 142. The first hinge structure 200 a mayperform hinge motion to correspond to rotary motions of the hinge plates141 and 142 coupled thereto. Two sub-hinge structures of the first hingestructure 200 a may be alternately disposed and may independentlyperform hinge motions depending on hinge motions of the hinge plates 141and 142, At least part of the first hinge structure 200 a may be formedof a metallic material.

The foreign matter collection members 501 and 502 may be disposed on oneside of the first hinge structure 200 a. For example, in FIG. 2, theforeign matter collection member 501 may be disposed on a left edge orside of the first hinge structure 200 a, and the foreign mattercollection member 502 may be disposed on a right edge or side of thefirst hinge structure 200 a. The foreign matter collection members 501and 502. may preferentially collect foreign matter introduced through agap between one side (e.g., the left) of the hinge housing 150 and thefirst and second housing structures 121 and 122 and may suppress amovement of the introduced foreign matter. Accordingly, the foldableelectronic device 100 may prevent occurrence of a phenomenon in whichthe introduced foreign matter (e.g., sand or particles having apredetermined size and hardness) is brought into contact with thedisplay 110 to damage at least part of the display 110.

The second hinge structure 200 b may be disposed at an opposite point ofthe hinge housing 150 that is symmetric to the first hinge structure 200a with respect to the central portion of the hinge housing 150.Alternatively, the second hinge structure 200 b may be disposed to bebiased to a lower side with respect to the central portion of theillustrated hinge housing 150. The second hinge structure 200 b may bedisposed adjacent to a lower end of the hinge housing 150. A portion ofthe second hinge structure 200 b may be fixed to the hinge housing 150,and other portions of the second hinge structure 200 b may be coupled tothe hinge plates 141 and 142. For example, one side of the second hingestructure 200 b may be coupled with an opposite side of the first hingeplate 141, and an opposite side of the second hinge structure 200 b maybe coupled to an opposite side of the second hinge plate 142. The secondhinge structure 200 b may perform hinge motion to correspond to rotarymotions of the hinge plates 141 and 142 coupled thereto.

Similar to the first hinge structure 200 a, the second hinge structure200 b may include two sub-hinge structures that are alternately disposedand that independently perform hinge motions depending on hinge motionsof the hinge plates 141 and 142. The second hinge structure 200 b may beformed of the same material as that of the first hinge structure 200 a.The second hinge structure 200 b may have substantially the samestructure and shape as the first hinge structure 200 a, but may differfrom the first hinge structure 200 a in terms of the position on thehinge housing 150.

The foreign matter collection members 503 and 504 may be disposed on oneside of the second hinge structure 200 b. For example, the foreignmatter collection member 503 may be disposed on a left edge of thesecond hinge structure 200 a, and the foreign matter collection member504 may be disposed on a right edge of the second hinge structure 200 b.The foreign matter collection members 503 and 504 may preferentiallycollect foreign matter introduced through a gap between an opposite side(e.g., the right) of the hinge housing 150 and the first and secondhousing structures 121 and 122 and may suppress a movement of theintroduced foreign matter. Accordingly, the foldable electronic device100 may prevent occurrence of a phenomenon in which the introducedforeign matter (e.g., sand or particles having a predetermined size andhardness) is brought into contact with the display 110 to potentiallydamage at least part of the display 110.

The third hinge structure 300 may be disposed on the central portion ofthe hinge housing 150. A portion of the third hinge structure 300 may befixed to the hinge housing 150, and other portions of the third hingestructure 300 may be connected to the first hinge plate 141 and thesecond hinge plate 142. The third hinge structure 300 may transmit forcethrough interlocking gears such that the first hinge plate 141 and thefirst housing structure 121 coupled to the first hinge plate 141 (or thesecond hinge plate 142 and the second housing structure 122 coupled tothe second hinge plate 142) perform hinge motion together with thesecond hinge plate 142 and the second housing structure 122 coupled tothe second hinge plate 142 (or the first hinge plate 141 and the firsthousing structure 121 coupled to the first hinge plate 141).

The detent structures 400 a, 400 b, 400 c, and 400 d may be disposed atpredetermined positions in the hinge housing 150. For example, the firstdetent structure 400 a may be disposed between the first hinge structure200 a and the third hinge structure 300. The second to fourth detentstructures 400 b, 400 c, and 400 d may be disposed between the secondhinge structure 200 b and the third hinge structure 300. In FIG. 2, thehinge module 200 includes the four detent structures 400 a, 400 b, 400c, and 400 d. However, the disclosure is not limited thereto. Forexample, the hinge module 200 may include one, two or more detentstructures. The detent structures 400 a, 400 b, 400 c, and 400 d mayhave the same structure and size, but may be disposed in the hingehousing 150 in different directions.

The first cover 161 may be disposed on a rear surface of the firsthousing structure 121 to cover at least part of the second surface 121 bof the first housing structure 121. The first cover 161 may be disposedto cover one side of the hinge housing 150 that is disposed between thefirst housing structure 121 and the second housing structure 122. Thefirst cover 161 may have rounded corners. The first cover 161 may havean empty space inside or may be fastened with the second surface 121 bof the first housing structure 121 to form an empty space between thefirst housing structure 121 and the first cover 161. For example, thefirst cover 161 may have a structure in which sidewalls are formed on anupper side, a left side, and a right side of a rectangular bottomsurface.

The second cover 162 may be disposed adjacent to the first cover 161 andmay be fastened to the fourth surface 122 b of the second housingstructure 122 to cover at least part of the fourth surface 122 b. Thesecond cover 162 may be disposed to cover the remaining portion of thehinge module 200 (e.g., an opposite side of the hinge housing 150) thatis partly hidden by the first cover 161. The second cover 162 may haverounded corners, similar to the first cover 161. The second cover 162may have an empty space inside or may be fastened with the fourthsurface 122 b of the second housing structure 122 to form an empty spacebetween the second housing structure 122 and the second cover 162. Inthis regard, the second cover 162 may have a structure in whichsidewalls are formed on a lower side, a left side, and a right side of arectangular bottom surface.

Although it has been described that the first hinge structure 200 a andthe second hinge structure 200 b are disposed at the opposite ends ofthe hinge housing 150 with respect to the central portion of the hingehousing 150 and the third hinge structure 300 is disposed between thefirst hinge structure 200 a and the second hinge structure 200 b, thedisclosure is not limited thereto. For example, separate interlockinggears may not be included, and only one of the first hinge structure 200a and the second hinge structure 200 b that are not interlocked witheach other may be disposed in the hinge housing 150. For example, thefirst hinge structure 200 a having a non-interlocking structure may bedisposed at one end of the hinge housing 150, and a plurality of hingestructures in the type of the third hinge structure 300 (e.g., aninterlocking structure including interlocking gears) may be disposed onthe central portion of the hinge housing 150 or at an opposite end ofthe hinge housing 150.

FIG. 3 illustrates a state in which some components of the foldableelectronic device illustrated in FIG. 2 are coupled, according to anembodiment.

Referring to FIG. 3, the components of the foldable electronic device100 may include the first housing structure 121, the second housingstructure 122, and the hinge module 200. In the foldable electronicdevice 100 illustrated in FIG. 3, the display 110 is removed from thefoldable electronic device 100 described with reference to FIG. 2.

The first housing structure 121 may be coupled with the first hingeplate 141. The first housing structure 121 may be disposed on one sideof the hinge module 200, such as an upper side with respect to FIG. 2.The first PCB 131 or the first battery 133 described above withreference to FIG. 2, may be mounted in the first housing structure 121,and the first area 51 and a portion of the central area 53 of thedisplay 110 may be disposed on the first housing structure 121.

The second housing structure 122 may be coupled with the second hingeplate 142. The second housing structure 122 may be disposed on anopposite side of the hinge module 200, such as a lower side with respectto FIG. 2. The second PCB 132 or the second battery 134 described abovewith reference to FIG. 2 may be mounted in the second housing structure122, and the second area 52 and the remaining portion of the centralarea 53 of the display 110 may be disposed on the second housingstructure 122.

The hinge module 200 may include the hinge housing 150, the first hingestructure 200 a, the second hinge structure 200 b, the third hingestructure 300, and at least one of the detent structures 400 a, 400 b,400 c, and 400 d (e.g., the detent structure 400 c of FIG. 3A). Forexample, the hinge module 200 may have a specified length in thehorizontal direction and may have a semi-elliptical cross-sectionalshape.

In FIG. 2, the first hinge structure 200 a may be disposed at a leftedge of the hinge housing 150, and the second hinge structure 200 b maybe disposed at a right edge of the hinge housing 150. The third hingestructure 300 may be disposed between the first hinge structure 200 aand the second hinge structure 200 b or in the center of the hingehousing 150,

Signal wiring, such as a flexible PCB (FPCB) may be disposed between thefirst detent structure 400 a and the third hinge structure 300 toelectrically connect electronic components placed in the first housingstructure 121 and electronic components placed in the second housingstructure 122. For example, a location where the signal wiring is placedmay be assigned on one side of the hinge module 200.

The first detent structure 400 a may be disposed between the first hingestructure 200 a and the third hinge structure 300. The second detentstructure 4006, the third detent structure 400 c, and the fourth detentstructure 400 d may be disposed between the third hinge structure 300and the second hinge structure 200 b. The first detent structure 400 amay be disposed adjacent to the first hinge structure 200 a. The seconddetent structure 4006 may be disposed adjacent to the third hingestructure 300. The fourth detent structure 400 d may be disposedadjacent to the second hinge structure 200 b. The third detent structure400 c may be disposed between the second detent structure 400 b and thefourth detent structure 400 d. The detent structures 400 a, 400 b, 400c, and 400 d may be formed in substantially the same structure, but mayalso be disposed such that arrangement directions alternate with oneanother.

The foreign matter collection member 501 may be disposed on a left edgeof the first hinge structure 200 a with respect to FIG. 3. For example,the foreign matter collection member 501 may be disposed on a boss holearea 551 a provided on the left edge of the first hinge structure 200 ato couple the first hinge structure 200 a to the hinge housing 150. Theforeign matter collection member 502 may be disposed on a right edge ofthe first hinge structure 200 a. For example, the foreign mattercollection member 502 may be disposed on a boss hole area 551 b providedon the right edge of the first hinge structure 200 a to couple the firsthinge structure 200 a to the hinge housing 150. Similar to the foreignmatter collection members 501 and 502 disposed on the first hingestructure 200 a, the foreign matter collection members 503 and 504 maybe disposed on the second hinge structure 200 b on a boss hole area 552a formed on a left edge of the second hinge structure 200 b, and theforeign matter collection member 504 may be disposed on a boss hole area552 b formed on a right edge of the second hinge structure 200 b.

In the foldable electronic device 100 , when foreign matter isintroduced through the areas where the hinge housing 150 and the firsthousing structure 121 or the second housing structure 122 are disposed,the introduced foreign matter may be collected by the foreign mattercollection members 501, 502, 503, and 504. Accordingly, the foldableelectronic device 100 may suppress diffusion of the foreign matterinside and may prevent damage or device failure by the foreign matter.

FIG. 4 illustrates examples of the hinge module and the hinge housingaccording to an embodiment.

Refuting to FIG. 4, as described above with reference to FIG. 2, thehinge housing 150 may have a hollow semi-cylindrical shape that isclosed at opposite ends. The hinge structures 200 a, 200 b, and 300 andthe detest structures 400 a, 400 b, 400 c, and 400 d may be disposed inthe hinge housing 150. Foreign matter collection members 521, 522, 531,541, 542. 543, and 544 may be disposed on at least parts of the insideof the hinge housing 150. For example, the first foreign mattercollection member 521 may be disposed on the inside of the hinge housing150 on which the first hinge structure 200 a is mounted, and the secondforeign matter collection member 522 may be disposed on the inside ofthe hinge housing 150 on which the second hinge structure 200 b ismounted. The areas where the first foreign matter collection member 521and the second foreign matter collection member 522 are disposed may bethe remaining inside areas other than the inside areas of the hingehousing 150 that correspond to hinge brackets rotated in the first hingestructure 200 a and the second hinge structure 200 b. When the firsthinge structure 200 a and the second hinge structure 200 b are disposedto be spaced apart from the inside of the hinge housing 150 at apredetermined interval, the first foreign matter collection member 521and the second foreign matter collection member 522 may be disposed on(or applied to) the inside of the hinge housing 150 so as not to makecontact with the first hinge structure 200 a and the second hingestructure 200 b.

The third foreign matter collection member 531 may be disposed on theinside of the hinge housing 150 on which the third hinge structure 300including at least one gear is mounted. The third foreign mattercollection member 531 may be provided in a form corresponding to theoverall size of the third hinge structure 300. The third foreign mattercollection member 531 may be disposed on the inside of the hinge housing150 so as not to make contact with components (e.g., inner brackets) ofthe third hinge structure 300 that perform hinge motions.

The fourth to seventh foreign matter collection members 541, 542, 543,and 544 may be disposed on the areas of the hinge housing 150 where thedetent structures 400 a, 400 b, 400 c, and 400 d are disposed. Forexample, the fourth foreign matter collection member 541 may be disposedon the inside of the hinge housing 150 on which the first detentstructure 400 a is disposed. Similarly, the fifth to seventh foreignmatter collection members 542, 543, and 544 may be disposed on theinside of the housing 150 on which the second to fourth detentstructures 400 a, 400 b, and 400 d are disposed.

Although it has been described that the foreign matter collectionmembers 521, 522, 531, 541, 542, 543, and 544 are disposed on thepredetermined areas of the hinge housing 150, the disclosure is notlimited thereto. For example, the foreign matter collection members 521,522, 531, 541, 542, 543, and 544 may be applied to (or disposed on) theentire inside of the hinge housing 150. The sizes of the foreign mattercollection members 521, 522, 531, 541, 542, 543, and 544 may varydepending on positions on the inside of the hinge housing 150. Forexample, among the foreign matter collection members 521, 522, 531, 541,542, 543, and 544, the foreign matter collection members disposed closeto the opposite edges of the hinge housing 150 may be formed to belarger than the foreign matter collection members disposed on thecentral portion of the hinge housing 150. Alternatively, the foreignmatter collection members 521, 522, 531, 541, 542, 543, and 544 may bedisposed in a structure including a plurality of pieces depending on theareas where the foreign matter collection members 521, 522, 531, 541,542, 543, and 544 are disposed. In this case, the number or size ofpieces of the foreign matter collection members disposed close to theopposite edges of the hinge housing 150 may be larger than the number orsize of pieces of the foreign matter collection members located on thecentral portion of the hinge housing 150. As described above, foreignmatter collection members may be disposed on only the opposite edges ofthe hinge housing 150.

FIG. 5 illustrates the first hinge structure or the second hingestructure according to an embodiment.

Referring to FIG. 5, the first hinge structure 200 a (or the secondhinge structure 200 b, although the following description is given basedon the first hinge structure 200 a) may include a first hinge bracket1521 connected to the first hinge plate 141, a second hinge bracket152.2 connected to the second hinge plate 142, and a center bracket 1541on which the first hinge bracket 1521 and the second hinge bracket 1522are mounted. The first hinge structure 200 a according to one embodimentmay include at least one foreign matter outlets 1561 or 1562 forreleasing foreign matter.

The center bracket 1541 may have a predetermined length and width so asto be mounted in the hinge housing, and at least part of a lower portionof the center bracket 1541 may include a curved surface to correspond tothe inside of the hinge housing 150. The center bracket 1541 may includea first rail part 1541 a in which the first hinge bracket 1521 ismounted to perform hinge motion, a second rail part 1541 b in which thesecond hinge bracket 1522 is mounted to perform hinge motion, and abracket body 1542 having the first rail part 1541 a formed on one sidethereof and the second rail part 154 lb formed on an opposite sidethereof. Boss holes areas 1551 and 1552 used to fix the first hingestructure 200 a to the hinge housing 150 may be formed on opposite edgesof the bracket body 1542. After the first hinge structure 200 a iscoupled to the hinge housing 150, the foreign matter collection members501 and 502 may be disposed on the boss hole areas 1551 and 1552.

The first hinge bracket 1521 may have a semi-circular cross-section, andthe first hinge bracket 1521 may be inserted into the first rail part1541 a in a first rotational direction and may be disposed to performhinge motion in the first rotational direction that is the same as thedirection in which the first hinge bracket 1521 is inserted into thefirst rail part 1541 a. A first stopper 4141 formed on the centerbracket 1541 may operate to prevent the first hinge bracket 1521 fromrotating through at least a specified angle (e.g., 0 or 180 degree) inthe first rotational direction, and thus the first hinge bracket 1521may not be separated from the center bracket 1541.

The second hinge bracket 1522 may have substantially the same structureand size as the first hinge bracket 1521. For example, the second hingebracket 1522 may have a semi-circular cross-section. The second hingebracket 1522 may be inserted into the second rail part 1541 b in asecond rotational direction and may be disposed to perform hinge motionin the second rotational direction. A second stopper 4142 formed on thecenter bracket 1541 may operate to prevent the second hinge bracket 1522from rotating through at least a specified angle (e.g., 180 or 0 degree)in the second rotational direction, and thus the second hinge bracket1522 may not be separated from the center bracket 1541.

The foreign matter outlets 1561 and 1562 may include the first foreignmatter outlet 1561 disposed in an adjacent area of the center bracket1541 into which the first hinge bracket 1521 is inserted and the secondforeign matter outlet 1562 disposed in an adjacent area of the centerbracket 1541 into which the second hinge bracket 1522 is inserted. Theforeign matter outlets 1561 and 1562 may be formed through front andrear surfaces of the center bracket 1541. Accordingly, foreign matterintroduced to a higher location than the first hinge structure 200 a orthe second hinge structure 200 b may be moved to a lower location thanthe first hinge structure 200 a or the second hinge structure 200 bthrough the foreign matter outlets 1561 and 1562.

For example, foreign matter introduced to a higher location than thefirst hinge structure 200 a may be moved to the inside of the hingehousing 150 through the first foreign matter outlet 1561 and may befixed by the first foreign matter collection member 521 described abovewith reference to FIG. 4. Similarly, foreign matter introduced to ahigher location than the second hinge structure 200 b may be moved tothe inside of the hinge housing 150 through the second foreign matteroutlet 1562 and may be fixed by the second foreign matter collectionmember 522 described above with reference to FIG. 4.

The foreign matter outlets 1561 and 1562 may be disposed adjacent orcontiguous to the first rail part 1541 a used to rotate the first hingebracket 1521 and the second rail part 1541 b used to rotate the secondhinge bracket 1522. The foreign matter outlets 1561 and 1562 may haveany shape formed through the front and rear surfaces of the centerbracket 1541, For example, the foreign matter outlets 1561 and 1562 maybe vertically formed through the front and rear surfaces of the centerbracket 1541 and may have a circular or polygonal (e.g., rectangular ortriangular) cross-section. To enable release of foreign matter even whenthe first hinge bracket 1521 and the second hinge bracket 1522 are in aflat state, the foreign matter outlets 1561 and 1562 may be verticallyformed through at least parts of surrounding areas where in the flatstate, the first hinge bracket 1521 and the second hinge bracket 1522are mounted in the first rail part 1541 a and the second rail part 1541b.

FIG. 6 illustrates a modified example of the first hinge structure orthe second hinge structure according to an embodiment. Referring to FIG.6, the first hinge structure 200 a (or the second hinge structure 200 b,although the following description is given based on the first hingestructure 200 a) may include the first hinge bracket 1521, the secondhinge bracket 1522, and the center bracket 1541. The first hinge bracket1521 may be coupled to the center bracket 1541 to perform motion frominside to outside (e.g., in the first rotational direction) with respectto the horizontal center line of the center bracket 1541 and may becoupled with the first hinge plate 141 based on first couplingprotrusions 1521 a. and 1521 b.

Accordingly, while the first hinge bracket 1521 performs hinge motion,the first hinge plate 141 may be mounted at a predetermined angledepending on the rotary motion of the first hinge bracket 1521. Thesecond hinge bracket 1522 may be disposed adjacent to the first hingebracket 152.1 and may be coupled to the center bracket 1541 to performmotion from inside to outside (e.g., in the second rotational directionopposite to the first rotational direction) with respect to thehorizontal center line of the center bracket 1541 and may be coupledwith the second hinge plate 142 based on second coupling protrusions1522 a and 1522 b. Accordingly, while the second hinge bracket 1522performs hinge motion, the second hinge plate 142 may be mounted at apredetermined angle depending on the rotary motion of the second hingebracket 1522.

FIG. 7 illustrates some components of the electronic device on which ismounted the modified first or second hinge structure, according to anembodiment.

Referring to FIGS. 6 and 7, a portion 601 a of an upper surface facingthe rear surface of the display 110 of the first hinge bracket 1521 instate 601 may be lowered by a certain height as in state 603 to form aportion 601 b of a modified first hinge bracket 1521_1. Similarly, aportion 602 a of an upper surface facing the rear surface of the display110 of the second hinge bracket 1522 in state 601 may be lowered by thespecified height as in state 603 to form a portion 602 b of a modifiedsecond hinge bracket 1522_1, and therefore, may have the same height asthe modified portion 601 b of the modified first hinge bracket 1521_1.

At least part of an upper surface of a modified first hinge structure200 a _1 may be formed to be lower than at least part of an uppersurface of the first hinge structure 200 a by the specified height,relative to the surface of the first hinge plate 141 or the second hingeplate 142. For example, the modified portion 601 b of the modified firsthinge bracket 1521_1 may be formed to be lower than the surroundingfirst hinge plate 141 by the specified height. The portion 602 b of themodified second hinge bracket 1522_1 may be formed to be lower than thesecond hinge plate 142 by the specified height. Accordingly, when thefirst hinge plate 141 and the second hinge plate 142 are in a flat state(e.g., when one surface of the first hinge plate 141 and one surface ofthe second hinge plate 142 are disposed side by side while facing therear surface of the display 110), the edge portion 601 b of the modifiedfirst hinge bracket 1521_1 and the edge portion 602 b of the modifiedsecond hinge bracket 1522_1 may be spaced apart from the rear surface ofthe display 110 at a specified interval.

FIG. 8 illustrates a modified example of the third hinge structureaccording to an embodiment. Referring to FIG. 8, the third hingestructure 300 may include a first main bracket 1411, a second mainbracket 1412, a first inner bracket 1421, a second inner bracket 1422,and at least one gears 1441 or 1442. The first inner bracket 1421 may becoupled to the first main bracket 1411 to perform motion from inside tooutside (e.g., in the first rotational direction) with respect to thehorizontal center line of the first main bracket 1411 and may be coupledwith the first hinge plate 141. Accordingly, while the first innerbracket 1421 performs hinge motion, the first hinge plate 141 may bemounted at a predetermined angle depending on the rotary motion of thefirst inner bracket 1421.

The second main bracket 1412 may be disposed adjacent to the first mainbracket 1411 and may be coupled with the second inner bracket 1422. Thesecond inner bracket 142.2 may be coupled to the second main bracket1412 to perform motion from inside to outside (e.g., in the secondrotational direction opposite to the first rotational direction) withrespect to the horizontal center line of the second main bracket 1412and may be coupled with the second hinge plate 142. Accordingly, whilethe second inner bracket 1422 performs hinge motion, the second hingeplate 142 may be mounted at a predetermined angle depending on therotary motion of the second inner bracket 1422.

The at least two gears 1441 and 1442 may connect the first inner bracket1421 and the second inner bracket 1422. Accordingly, force generatedduring rotation of the first inner bracket 1421 may be transmitted tothe second inner bracket 1422 through the at least two gears 1441 and1442, and vice versa.

A portion of an upper surface facing the rear surface of the display110, of the first inner bracket 1421 illustrated in state 801 may belowered by a specified height as illustrated in state 803 to form aportion 801 a of a modified first inner bracket 1421 a. Similarly, aportion of an upper surface facing the rear surface of the display 110,of the second inner bracket 1422 illustrated in state 801 may be loweredby the specified height as illustrated in state 803 to form a portion801 b of a modified second inner bracket 1422 a. For example, at leastpart of an upper surface of a modified third hinge structure 300_1 maybe formed to be lower than at least part of an upper surface of thethird hinge structure 300 by the specified height. The modified portions801 a and 802 a may be disposed to have the same height.

FIG. 9 illustrates some components of the electronic device on which ismounted the modified third hinge structure, according to an embodiment.

Referring to FIG. 9. the remaining portion 802 a of the upper surface ofthe first inner bracket 1421 other than the portion coupled with thefirst hinge plate 141 may be formed to be lower than the surroundingfirst hinge plate 141. Similarly, the remaining portion 802 b of theupper surface of the second inner bracket 1422 other than the portioncoupled with the second hinge plate 142 may be formed to be lower thanthe surrounding second hinge plate 142

10 illustrates one of cross-sections of modified forms of the hingestructures according to an embodiment. In FIG. 10, one of cross-sectionsof areas including the portions 601 b, 602 b, 801 a, 801 b, 802 a, and802 b included in the hinge brackets is illustrated based on a state inwhich the hinge plate 141 or 142 and the display 110 are disposed on thehinge structures described above with reference to FIGS. 6 to 9.

Referring to FIG. 10, in state 1001, the upper surface of at least oneof the first hinge bracket 1521, the second hinge bracket 1522, thefirst inner bracket 1421, and the second inner bracket 1422 may bedisposed to have the same height as the surrounding hinge plate 141 or142 when the foldable electronic device 100 is in a flat state.Accordingly, the upper surface of at least one of the first hingebracket 1521, the second hinge bracket 1522, the first inner bracket1421, and the second inner bracket 1422 may be disposed to make contactwith the rear surface of the display 110 when the foldable electronicdevice 100 is in the flat state.

When at least part of the upper surface of at least one of the firsthinge bracket 1521, the second hinge bracket 1522, the first innerbracket 1421, and the second inner bracket 1422 is stained with foreignmatter, such as grease or sand as examples, the foreign matter may bemoved to the rear surface of the display 110 due to contact between therear surface of the display 110 and the upper surface of at least one ofthe first hinge bracket 1521, the second hinge bracket 1522, the firstinner bracket 1421, and the second inner bracket 1422. In this case, theforeign matter may cause damage to the rear surface of the display 110,or the visibility of the display 110 from the outside may be reduced,such that the foreign matter may appear as a stain.

As described above with reference to FIGS. 6, 8, and 9, portions of thehinge structures of the foldable electronic device 100 may be formed tobe lower than the surroundings depending on modification. In this case,as in state 1003, portions (e.g., 601 b, 602 b, 801 a, 801 b, 802 a, and802 b) of the modified first hinge bracket 1521_1, the modified secondhinge bracket 1522 1, the modified first inner bracket 1421 a, and themodified second inner bracket 1422 a may be spaced apart from the rearsurface of the display 110 by a specified gap even when the modifiedfirst hinge bracket 1521_1, the modified second hinge bracket 1522_1,the modified first inner bracket 1421 a, and the modified second innerbracket 1422 a are in a flat state. Accordingly, even when foreignmatter is on the portions of the modified first hinge bracket 1521_1,the modified second hinge bracket 1522_1, the modified first innerbracket 1421 a, and the modified second inner bracket 1422 a, theforeign matter may not have a particular adverse influence on the rearsurface of the display 110 due to the gap.

FIG. 11A illustrates an exploded perspective view of the third hingestructure of the foldable electronic device according to an embodiment.FIG. 11B illustrates the third hinge structure of the foldableelectronic device in a flat state.

Referring to FIGS. 11A and 11B, main brackets 1411 and 1412 of the thirdhinge structure 300 may each have an insertion space 415 surrounded by aplurality of inner walls, and inner brackets 1421 and 1422 may beinserted into the insertion spaces 415, respectively. Accordingly,removal of the assembled parts may be prevented even though an impact isapplied to the electronic device 100, and the number of parts may bedecreased, which results in reducing failure or defect rate.

In this regard, in the third hinge structure 300 connecting a pluralityof housings of the electronic device, the plurality of main brackets1411 and 1412 may each include the insertion space 415 surrounded by theplurality of inner walls, the plurality of inner brackets 1421 and 1422may be inserted into the insertion spaces 415 to rotate alongpredetermined rotational paths and may include internal gears 4241 and4242 therein, respectively, and at least one main gears 1431 or 1432 maybe engaged with the internal gears 4241 and 4242 and may rotate togetherwhen the plurality of inner brackets 1421 and 1422 rotate.

The main brackets 1411 and 1412 may be fixed to the hinge housing 150and may serve as a body of the third hinge structure 300 to which otherparts are assembled. The main brackets 1411 and 1412 may each includethe insertion space 415 surrounded by the plurality of inner walls. Thetwo main brackets 1411 and 1412 may be formed. However, the number ofmain brackets is not limited thereto, and three or more main bracketsmay be formed.

The inner brackets 1421 and 1422 may be inserted into the insertionspaces 415 included in the main brackets 1411 and 1412 and may be fixedto the first and second housings 121 and 122 to rotate the first andsecond housings 121 and 122. The inner brackets 1421 and 1422 mayinclude the internal gears 4241 and 4242 therein, respectively. Asillustrated, the two inner brackets 1421 and 1422 may be formed,However, the number of inner brackets is not limited thereto, and threeor more inner brackets may be formed.

The third hinge structure 300 may further include the main gears 1431and 1432 and idle gears 1441 and 1442. The idle gears 1441 and 1442 maybe engaged with the at least two main gears 1431 and 1432 and mayconnect the plurality of main brackets 1411 and 1412. Accordingly, theidle gears 1441 and 1442 may transmit rotational power of the first maingear 1431 to the second main gear 1432. Without being limited thereto,however, the third hinge structure 300 may not include the idle gears1441 and 1442. In this case, the plurality of main brackets 1411 and1412 may be disposed to be directly engaged with each other.

For example, the plurality of inner walls of each of the main brackets1411 and 1412 may include a pair of inner walls disposed on oppositesides in the direction of axes of rotation A.R.I 1 and A.R.I. 2 (seeFIG. 11C, described below) of the inner brackets 1421 and 1422 to faceeach other. When the first inner bracket 1421 rotates, the rotationalpower may be transmitted to the first internal gear 4241, the first maingear 1431, the first idle gear 1441, the second idle gear 1442, thesecond main gear 1432, and the second internal gear 4242, and thus thesecond inner bracket 1422 may also rotate.

FIG. 11C is a sectional view of the third hinge structure 300 takenalong line A-A′ of FIG. 11B.

Referring to FIGS. 11A, 11B and 11C, the first housing structure 121 andthe second housing structure 122 of the electronic device 100 may beconnected to rotate relative to each other, For example, when a userrotates the first or second housing structure 121 or 122 to fold theelectronic device in an unfolded state (or a flat state), the innerbrackets 1421 and 1422 fixed to the first and second housing structures121 and 122 through the hinge plates 141 and 142 may rotate about theaxes of rotation A.R.I along the predetermined rotational paths. Becausethe inner brackets 1421 and 1422 are fixed to the first and secondhousing structures 121 and 122, the rotational paths of the innerbrackets 1421 and 1422 may correspond to the paths along which the firstand second housing structures 121 and 122 are folded or unfolded. Inanother example, the axes of rotation A.R.I 1 and A.R.I. 2 of the innerbrackets 1421 and 1422 may be in agreement with the axes of rotation ofthe first and second housing structures 121 and 122 fixed to the innerbrackets 1421 and 1422 and may be parallel to the axis of symmetry A.Sof the first and second housing structures 121 and 122.

According to an embodiment, circles with a predetermined radius may bedrawn about the axes of rotation A.R.I of the inner brackets 1421 and1422 as illustrated in FIG. 11C. To minimize interference when the innerbrackets 1421 and 1422 rotate, lower surfaces of the inner brackets 1421and 1422 may have arc shapes existing on the circles. For example, thelower surfaces of the inner brackets 1421 and 1422 may have arc shapeshaving the axes of rotation A.R.I 1 and A.R.I. 2 of the inner brackets1421 and 142.2 as center points.

The inner brackets 1421 and 1422 may be disposed in the main brackets1411 and 1412 and may include moving spaces 1426 in which the main gears1431 and 1432 are capable of moving. The moving spaces 1426 may be movedwhile having arc shapes with the axes of rotation A.R.I 1, A.R.I. 2 ofthe inner brackets 1421 and 1422 as center points.

The inner brackets 1421 and 1422 may include the internal gears 4241 and4242 that are engaged with gears of the main brackets 1411 and 1412,Accordingly, when the inner brackets 1421 and 1422 rotate, the internalgears 4241 and 4242 may rotate the main gears 1431 and 1432. At thistime, the internal gear 4241 may have an arc shape with the axis ofrotation 2 of the inner bracket 142.1 as the center point.

Gear teeth of the internal gears 4241 and 4242 may protrude toward themoving spaces 1426. The gear teeth of the internal gears 4241 and 4242may protrude from inner circumferential surfaces of the moving spaces1426 in the radial directions with respect to the axes of rotation A.R.I1 and A.R.I 2 of the inner brackets 1421 and 1422, Without being limitedthereto, however, the gear teeth of the internal gears 4241 and 4242 mayprotrude from outer circumferential surfaces of the moving spaces 1426in the directions toward the axes of rotation A.R.I 1 and A.R.I 2 of theinner brackets 1421 and 1422.

FIG. 11D is a sectional view of the third hinge structure 300 takenalong line B-B′ of FIG. 11B.

Referring to FIGS. 11A to 11D, when the first housing structure 121rotates, the first inner bracket 1421 fixed to the first housingstructure 121 through the first hinge plate 141 of FIG. 2 may rotate.Then, the first internal gear 4241 included in the first inner bracket1421 and engaged with the first main gear 1431 may be rotated.

As illustrated in FIG. 11D, the first main gear 1431, the first idlegear 1441, the second idle gear 1442, and the second main gear 1432 maybe sequentially engaged with one another. Accordingly, rotational powerof the first main gear 1431 may be transmitted to the first idle gear1441, the second idle gear 1442, and the second main gear 1432.

FIG. 11E is a sectional view of the third hinge structure 300 takenalong line C-C′ of FIG. 11B.

Referring to FIGS. 11A to 11E, in the third hinge structure 300, thefirst main bracket 1411 and the first inner bracket 1421 may be disposedto have a predetermined tolerance (e.g., a first gap Gap1) as in state1091. The first inner bracket 1421 may include a moving space 1421_3 asdescribed above. The moving space 1421_3 may be formed by an upper rail1421_1 formed in the first inner bracket 1421 and a lower rail 1421_2spaced apart from the upper rail 1421_1 at a specified interval, inwhich at least part of the inside of the lower rail 1421_2 has an arcshape corresponding to an arc shape of the moving space 1421_3. Apartial surface of the first main bracket 1411 disposed on one side ofthe moving space 1421_3 may be spaced apart from an upper surface of thelower rail 1421_2 by the first gap Gap1. An upper surface of the firstmain bracket 1411 disposed on the one side of the moving space 1421_3may be spaced apart from a lower surface of the upper rail 1421_1 by thefirst gap Gap1. The first gap Gap1 may be changed while the first innerbracket 1421 rotates.

In state 1093, a modified third hinge structure 300_2 may be configuredto minimize the first gap Gap1. For example, the modified third hingestructure 300_2 may include at least one of a modified upper rail 1421_1a, a modified lower rail 1421_2 a, and a modified moving space 1421_3 a.The interval between the modified upper rail 1421 la and the modifiedlower rail 1421_2 a may vary depending on at least one of the modifiedupper rail 1421_la, the modified lower rail 1421_2 a, and the modifiedmoving space 1421_3 a. Accordingly, a second gap Gap2 may be formedbetween a lower surface of the first main bracket 1411 and an uppersurface of the modified lower rail 1421_2 a. The second gap Clap2 may besmaller than the first gap Gap1. A third gap Gap0 may be formed betweenan upper surface of the first main bracket 1411 and a lower surface ofthe modified upper rail 1421_1 a. The third gap Gap0 may be zero. Forexample, the upper surface of the first main bracket 1411 may be broughtinto contact with the lower surface of the modified upper rail 1421_1 a.The second gap Gap2 and the third gap Gap0 described above may bemodified depending on a movement of the first inner bracket 1421.

FIG. 12 illustrates a detent structure according to an embodiment.

Referring to FIGS. 2. and 12, the third detent structure 400 c mayinclude a first plate coupling part 410 and a second plate coupling part420. Similar to the third detent structure 400 c, the first detentstructure 400 a, the second detent structure 400 b, and the fourthdetent structure 400 d may also include a first plate coupling part anda second plate coupling part.

The first plate coupling part 410 may be coupled with the first housingstructure 121 through the first hinge plate 141. Alternatively, thefirst plate coupling part 410 may be coupled with the second housingstructure 122 through the second hinge plate 142. At least part, of thefirst plate coupling part 410 may be formed of a metallic material(e.g., stainless steel (SUS), aluminum, or an alloy thereof), or atleast part of the first plate coupling part 410 may be formed of anon-metallic material (e.g., plastic). The first plate coupling part 410may include a first coupling body 411, a bridge 412, a first supportportion 413, and a second support portion 414.

The first coupling body 411 may have a bar or rod shape with apredetermined thickness that has a specified first length in first axisdirections (x, −x) and a second length in second axis directions (y, −y)and has rounded edges or corners. In one embodiment, a first rivet hole411 b may be disposed near an edge of the first coupling body 411 thatfaces a first direction (−x), a second rivet hole 411 c may be disposednear an edge of the first coupling body 411 that faces a seconddirection (x), and a first coupling hole 411 a may be disposed in thecenter of the first coupling body 411. The first rivet hole 411 b may bedisposed to pass through a hole formed on one side of the first hingeplate 141 or the second hinge plate 142, and in a rivet process, a firstrivet may be coupled to the first rivet hole 411 b to fix the firsthinge plate 141 or the second hinge plate 142 to the first coupling body411. The second rivet hole 411 c may be disposed to pass through a holeformed on one side of the second hinge plate 142 or the first hingeplate 141, and in a rivet process, a second rivet may be coupled to thesecond rivet hole 411 c to fix the second hinge plate 142 or the firsthinge plate 141 to the first coupling body 411.

The bridge 412 may have a specified width and may extend from thecentral portion of the first coupling body 411 by a predetermined lengthin a third direction (−y). A portion of the first coupling hole 411 amay be disposed on one side of the bridge 412. The first support portion413 and the second support portion 414 may be connected to an end of thebridge 412.

One side of the first support portion 413 may extend from the bridge412, and the first support portion 413 may have an overall reversed “L”shape. The first support portion 413 may include a first wing 413 a, asecond wing 413 b, a first mounting hole 413 c, and a first curvedportion 413 d. The first mounting hole 413 c may be formed in the shapeof a through-hole or a recess. The first wing 413 a may have apredetermined width and may extend from the bridge 412 in the seconddirection (x). The second wing 413 b may have a predetermined width andmay extend from an end of the first wing 413 a in the third direction(−y). The first mounting hole 413 c may be formed through the secondwing 413 b (e.g., in the first axis directions (x, −x)) and may have apredetermined size. The first curved portion 413 d may be bent with aspecified curvature from an end of the second wing 413 b in the seconddirection (x) (e.g., in the same direction as the direction in which thefirst wing 413 a extends from the end of the bridge 412). The firstcurved portion 413 d may allow a first mounting part 431 to be smoothlyinserted toward the inside of the first support portion 413 while thefirst plate coupling part 410 and the second plate coupling part 420 arecoupled together. The first curved portion 413 d may serve to guide amovement of the first mounting part 431 toward the first mounting hole413 c while the first mounting part 413 is inserted into the firstmounting hole 413 c. The first plate coupling part 410 and the secondplate coupling part 420 may rotate depending on rotation of the firsthousing structure 121 and the second housing structure 122, and thefirst curved portion 413 d may be formed to protrude, or to be bent, bya specified height in a direction inclined by a specified angle from the−y axis to the −x axis to allow the first mounting part 431 to besmoothly inserted toward the inside of the first support portion 413.

The second support portion 414 may extend from the bridge 412 in thefirst direction (−x) and may have an overall “L” shape that is symmetricto the first support portion 413 with respect to the second axisdirections (y, −y). The second support portion 414 may include a thirdwing 414 a, a fourth wing 414 b, a second mounting hole 414 c, and asecond curved portion 414 d. The second mounting hole 414 c may beformed in the shape of a through-hole or a recess. The third wing 414 amay have a predetermined width and may extend from the end of the bridge412 in the first direction (−x). The fourth wing 414 b may have apredetermined width and may extend from an end of the third wing 414 ain the third direction (−y). The second mounting hole 414 c may beformed through the fourth wing 414 b. The second curved portion 414 dmay be formed at an end of the fourth wing 414 b so as to he symmetricto the first curved portion 413 d with respect to the second axisdirections (y, −y). The fourth wing 414 b and the second wing 413 b maybe disposed to be symmetric to each other with respect to the secondaxis directions (y, −y), of which the first curved portion 413 d and thedirection in which the first curved portion 413 d is bent may besymmetric to the second curved portion 414 d and the direction in whichthe second curved portion 414 d is bent.

The second plate coupling part 420 may he coupled with the secondhousing structure 122 through the second hinge plate 142. When the firstplate coupling part 410 is coupled with the second housing structure 122through the second hinge plate 142, the second plate coupling part 420may he coupled with the first housing structure 121 through the firsthinge plate 141. The second plate coupling part 420 may be brought intocontact with, or spaced apart from, the first plate coupling part 410depending on the angle between the second housing structure 122 and thefirst housing structure 121. At least part of the second plate couplingpart 420 may he formed of a metallic material or the same material asthat of the first plate coupling part 410. At least part of the secondplate coupling part 420 may be formed of a metallic or a non-metallicmaterial.

The second plate coupling part 420 may include a second coupling body421, a mounting body 422, an elastic member 430, and mounting parts 431and 432. The second coupling body 421 and the mounting body 422 may beintegrated with each other. The second coupling body 421 and themounting body 422 may he formed of the same material as that of thefirst coupling body 411 and/or the support portions 413 and 414.

The second coupling body 421 may have a predetermined thickness andwidth and may be formed of a metallic material. The second coupling body421 may include a plate mounting portion 4211 a that is formed in alower position than a surrounding portion by a specified height and onwhich the second hinge plate 142 or the first hinge plate 141 ismounted, a second coupling hole 421 a _1 formed on the plate mountingportion 421 a and used to couple the second hinge plate 142 or the firsthinge plate 141, and at least one coupling protrusion 421 a _2 that isformed on the surrounding portion formed in a higher position than theplate mounting portion 421 a by the specified height and that is used tocouple the second hinge plate 142 or the first hinge plate 141. Theplate mounting portion 421 a may be concavely formed to have a specifieddepth (e.g., the thickness of the hinge plate) in one direction (-z)such that the portion to which the first or second hinge plate 141 or142 is coupled does not further protrude upward beyond the surroundingportion. The at least one coupling protrusion 421 a _2 may be alignedwith a recess or hole formed in the first or second hinge plate 141 or142 and may prevent a movement of the first or second hinge plate 141 or142. When the first or second hinge plate 141 or 142 is coupled to thesecond plate coupling part 420, the at least one coupling protrusion 421a _2 may serve to guide the first or second hinge plate 141 or 142 suchthat the first or second hinge plate 141 or 142 is mounted on the platemounting portion 421 a well.

The mounting body 422 may extend from the second coupling body 421 in afourth direction (y), and the elastic member 430 and the mounting parts431 and 432 may be mounted in the mounting body 422. For example, themounting body 422 may have a step in the same direction (-z) as that ofthe step of the plate mounting portion 421 a such that the elasticmember 430 is mounted in the step, and may have a form corresponding tothe external appearance of the elastic member 430. For example, themounting body 422 may include an elastic member mounting portion 422 a,at least part of which includes a curved surface to correspond to theexternal appearance of the elastic member 430 in the form of a coilspring. The mounting body 422 may have, in opposite sidewalls thereof,fixing holes 422_1 and 422_2 into which the mounting parts 431 and 432are fixedly inserted. For example, the mounting body 422 may include thefirst fixing hole 422_1 that is formed in the sidewall facing the seconddirection (x) and that has a larger diameter than a protrusion of thefirst mounting part 431 and the second fixing hole 422_2 that is formedin the sidewall facing the first direction (−x) and that has a largerdiameter than a protrusion of the second mounting part 432.

The elastic member 430 may be mounted in the elastic member mountingportion 422 a of the mounting body 422 in the form of a coil spring or aplate spring shape. In the elastic member mounting portion 422 a, theelastic member 430 may exert elastic force such that the first mountingpart 431 and the second mounting part 432 are mounted in the seconddirection (x) and the first direction (−x).

The mounting parts 431 and 432 may be connected to opposite sides of theelastic member 430 and may be disposed to partly protrude in the seconddirection (x) and the first direction (−x) through the first fixing hole4221 and the second fixing hole 4222 that are formed in the mountingbody 422. For example, the second mounting part 432 or the firstmounting part 431 may include a protrusion 432 a including apredetermined curved surface, a flange 432 b provided at the bottom ofthe protrusion 432 a and having a larger diameter than the second fixinghole 422_2, and/or a column 432 c inserted into one side of the elasticmember 430. At least part of the protrusion 432 a may protrude outsidethe mounting body 422 through the second fixing hole 422_2 and may bebrought into contact with the first plate coupling part 410 depending onhinge motions of the housing structures 121 and 122. The flanges 432 bof the mounting parts 431 and 432 may serve to support the mountingparts 431 and 432 such that the mounting parts 431 and 432 are notseparated from the fixing holes 4221 and 422_2. The columns 432 c of themounting parts 431 and 432 may support the elastic member 430 to preventthe mounting parts 431 and 432 from being separated from the elasticmember 430 and prevent the elastic member 430 from being separated fromthe elastic member mounting portion 422 a. At least part of at least oneof the mounting parts 431 and 432 may be formed of a metallic or anon-metallic material.

The mounting parts 431 and 432 may make contact with the first curvedportion 413 d and the second curved portion 414 d first in an operationof making contact with the first plate coupling part 410. In this state,the mounting parts 431 and 432 may remain in contact with the curvedportions 413 d and 414 d when specified pressure is not added.Accordingly, the first housing structure 121 and the second housingstructure 122 may be temporarily fixed at a specified first angle. Whenthe specified pressure or more is added so that the mounting parts 431and 432 are moved into the mounting body 422 through the fixing holes422_1 and 422_2, at least part of the second plate coupling part 420 maybe moved into the first plate coupling part 410. The mounting parts 431and 432, when aligned with the mounting holes 413 c and 414 c, may be atleast partially inserted into the mounting holes 413 c and 414 c whilethe portions of the mounting parts 431 and 432 pushed into the mountingbody 422 are moved outside the fixing holes 422_1 and 422 2 by theelastic member 430. In this case, the first housing structure 121 andthe second housing structure 122 may have a flat state.

According to an embodiment, an electronic device may include a firsthousing, a second housing, a display disposed on the first housing andthe second housing, at least one hinge structure that connects the firsthousing and the second housing, a hinge housing that surrounds at leastpart of the at least one hinge structure, and at least one foreignmatter collection member that is disposed on one side of the at leastone hinge structure and that collects foreign matter introduced into theelectronic device.

The at least one hinge structure may include a first hinge structuredisposed at a left edge of the hinge housing and a second hingestructure disposed at a right edge of the hinge housing.

The at least one foreign matter collection member may be disposed on atleast one of an upper side of the first hinge structure and an upperside of the second hinge structure.

The at least one foreign matter collection member may be disposed on atleast one of a left edge and a right edge of the first hinge structureand at least one of a left edge and a right edge of the second hingestructure.

The at least one foreign matter collection member may be disposed on atleast one of at least one boss hole area provided on one side of thefirst hinge structure and used to couple the first hinge structure andthe hinge housing and at least one boss hole area provided on one sideof the second hinge structure and used to couple the second hingestructure and the hinge housing.

At least one of the first hinge structure and the second hinge structuremay include a center bracket, a first hinge bracket that is connected tothe center bracket and that rotates in a first direction, and a secondhinge bracket that is connected to the center bracket and that rotatesin a second direction. A specified gap may be formed between at leastpart of the first hinge bracket and a rear surface of the display orbetween at least part of the second hinge bracket and the rear surfaceof the display when the first housing and the second housing are in aflat state.

The at least one hinge structure may include a first hinge structuredisposed at a left edge of the hinge housing and a second hingestructure disposed at a right edge of the hinge housing. The at leastone foreign matter collection member may be disposed in at least one ofa. space between the first hinge structure and the inside of the hingehousing and a space between the second hinge structure and the inside ofthe hinge housing.

At least one of the first hinge structure and the second hinge structuremay include at least one foreign matter outlet that is formed throughfront and rear surfaces thereof and that induces the foreign mattertoward the inside of the hinge housing.

The at least one hinge structure may include a third hinge structuredisposed in the center of the hinge housing.

The at least one foreign matter collection member may be disposedbetween the third hinge structure and the inside of the hinge housing.

The third hinge structure may include main brackets, a first innerbracket and a second inner bracket that are coupled with the mainbrackets and that perform rotary motions in different directions, atleast one idle gear engaged with internal gears of the first innerbracket and the second inner bracket, and main gears engaged with the atleast one idle gear. A specified gap may be formed between at least partof the first inner bracket and a rear surface of the display or betweenat least part of the second inner bracket and the rear surface of thedisplay when the first housing and the second housing are in a flatstate.

The at least one hinge structure may include a first hinge structuredisposed at a left edge of the hinge housing, a second hinge structuredisposed at a right edge of the hinge housing, a third hinge structuredisposed in the center of the hinge housing, and a first detentstructure disposed between the first hinge structure and the third hingestructure. The at least one foreign matter collection member may bedisposed between the first detent structure and the inside of the hingehousing.

The at least one hinge structure may include a first hinge structure 200a disposed at a left edge of the hinge housing, a second hinge structuredisposed at a right edge of the hinge housing, a third hinge structuredisposed in the center of the hinge housing, and at least one detentstructure disposed between the second hinge structure and the thirdhinge structure. The at least one foreign matter collection member 542,543, or 544 may be disposed between the at least one detent structureand the inside of the hinge housing.

The at least one hinge structure may include a first hinge structuredisposed at a left edge of the hinge housing, a second hinge structuredisposed at a right edge of the hinge housing, a third hinge structuredisposed in the center of the hinge housing, a first detent structuredisposed between the first hinge structure and the third hingestructure, and at least one second detent structure disposed between thesecond hinge structure and the third hinge structure. The at least oneforeign matter collection member may be disposed between the inside ofthe hinge housing and the first hinge structure, the second hingestructure, and the third hinge structure and between the inside of thehinge housing and the first detent structure and the at least one seconddetent structure.

The foreign matter collection member disposed between the first hingestructure and the inside of the hinge housing may be formed to be largerthan the foreign matter collection member disposed between the thirdhinge structure and the inside of the hinge housing.

The number of foreign matter collection members disposed between thefirst hinge structure and the inside of the hinge housing may be largerthan the number of foreign matter collection members disposed betweenthe third hinge structure and the inside of the hinge housing.

The at least one foreign matter collection member may be disposed underthe display.

The at least one foreign matter collection member may include at leastone of a tape, gel, and liquid form.

According to an embodiment, an electronic device may include a firsthousing, a second housing, a display disposed on the first housing andthe second housing, at least one hinge structure that connects edges atwhich the first housing and the second housing meet when the display isin a flat state, a hinge housing 150 in which the hinge structure ismounted, and at least one foreign matter collection member disposedbetween the hinge structure and the hinge housing. A first axis (or afirst virtual axis) about which the first housing rotates and a secondaxis (or a second virtual axis) about which the second housing rotatesmay be formed at positions spaced apart upward from a bottom surface ofthe display by a predetermined distance.

The at least one hinge structure may include a hinge structure disposedin the center of the hinge housing, and the hinge structure may includemain brackets, a first inner bracket and a second inner bracket that arecoupled with the main brackets and that perform rotary motions indifferent directions, at least one idle gear engaged with internal gearsof the first inner bracket and the second inner bracket, and main gearsengaged with the at least one idle gear. A specified gap may be formedbetween at least part of the first inner bracket and a rear surface ofthe display or between at least part of the second inner bracket and therear surface of the display when the first housing and the secondhousing are in a flat state.

FIG. 13 illustrates an arrangement of foreign matter collection membersaccording to a first embodiment.

Referring to FIG. 13, as described above with reference to FIG. 4, thehinge housing 150 may have an overall cylindrical shape that has anempty space inside and that is closed at opposite ends. At least part ofthe inside or outside of the hinge housing 150 may include a curved areaor a flat area. The hinge structures 200 a, 200 b, and 300 and thedetent structures 400 a, 400 b, 400 c, and 400 d may be disposed in thehinge housing 150. Additionally or alternatively, at least one pieces ofsignal wiring 610 or 620may be disposed on one side of the hinge housing150. For example, the at least two pieces of signal wiring 610 and 620may support signal transmission between a first electronic component (orelectronic part) disposed in a first housing structure and a secondelectronic component (or electronic part) disposed in a second housingstructure. The at least two pieces of signal wiring 610 and 620 mayinclude the first signal wiring 610 (e.g., a first FPCB) and the secondsignal wiring 620 (e.g., a second FPCB). The first signal wiring 610 andthe second signal wiring 620 may be implemented with one FPCB. At leasta part of the first signal wiring 610 and at least part of the secondsignal wiring 620 may be implemented in a rigid type or a flexible type,and at least parts of the remaining wiring portions beyond oppositeedges of the hinge housing 150 that are connected with the at leastpartial areas disposed in the hinge housing 150 may be implemented in arigid type.

The foreign matter collection members 541, 542, 543, and 544 may bedisposed on at least partial areas of the inside of the hinge housing150 other than areas 159 a, 159 b, and 157 where structures (e.g., thefirst hinge structure 200 a, the second hinge structure 200 b, and thethird hinge structure 300) that support a hinge function of theelectronic device are disposed. For example, no foreign mattercollection members may be disposed on the first inner surface 159 a ofthe hinge housing 150 on which the first hinge structure 200 a ismounted, the second inner surface 159 b of the hinge housing 150 onwhich the second hinge structure 200 b is disposed, and the third innersurface 157 of the hinge housing 150 on which the third hinge structure300 is disposed. The foreign matter collection members 541, 542, 543,and 544 may be disposed on only the inner surfaces of the hinge housing150 on which the first to fourth detent structures 400 a, 400 b, 400 c,and 400 d are disposed. As the electronic device having theabove-described structure does not include separate foreign mattercollection members under the hinge structures 200 a, 200 b, and 300 thatperform hinge motions, the hinge motions of the hinge structures 200 a,200 b, and 300 may not be hampered by collected foreign matter.Furthermore, as the hinge structures 200 a, 200 b, and 300 do not makedirect contact with the foreign matter collection members havingstickiness or adhesiveness, an impediment to the hinge motions of thehinge structures 200 a, 200 b, and 300 by the foreign matter collectionmembers may be prevented.

In FIG. 13, no foreign matter collection members may be disposed on afirst wiring arrangement area 158 a (or an inner surface) and a secondwiring arrangement area 158 b (or an inner surface) of the hinge housing150 where the first signal wiring 610 and the second signal wiring 620are mounted. Accordingly, damage to the first signal wiring 610 and thesecond signal wiring 620 by the foreign matter collection members havingstickiness or adhesiveness may be prevented, and the signal wiring 610and 620 may be easy to replace. For example, when foreign mattercollection members are applied to the first wiring arrangement area 158a and the second wiring arrangement area 158 b and the signal wiring 610and the signal wiring 620 are mounted on the corresponding areas, thesignal wiring 610 and the signal wiring 620 may be fixed by being stuckor attached to the foreign matter collection members. Therefore, whilethe electronic device performs hinge motion, the signal wiring 610 and620 may be damaged, or may be at least partially worn by contact withsurrounding structures. Furthermore, because the signal wiring 610 andthe signal wiring 620 are attached to the bottom surface of the hingehousing 150 through the foreign matter collection members, at leastparts of the signal wiring 610 and the signal wiring 620 may be damagedin a replacement or rearrangement process. Accordingly, no separateforeign matter collection members may be disposed on the signal wiringareas 158 a and 158 b.

A foreign matter collection member may be applied to at least a partialarea of at least one of an upper surface of the first signal wiring 610facing an opposite direction to the direction in which the first signalwiring 610 is mounted on the hinge housing 150, or a surface facingtoward the rear surface of the display 110, and an upper surface of thesecond signal wiring 620. As the display 110 is disposed over the signalwiring 610 and 620, the signal wiring 610 and 620 and the display 110may interfere with each other during hinge motion. Therefore, theforeign matter collection members may be disposed on partial areas ofthe signal wiring 610 and 620, and the partial areas may be areasdisposed on the inside of the hinge housing 150 and not brought intocontact with the display 110 during hinge motion.

A partition wall 541 a may be disposed between the second signal wiringarea 158 b and one area of the hinge housing 150 on which the firstdetent structure 400 a is mounted. An opening 541 b (or, a passage hole,or recess) may be formed on one side of the partition wall 541 a toconnect a space including the second signal wiling area 158 b and aspace including the one area of the hinge housing 150 on which the firstdetent structure 400 a is mounted. Accordingly, foreign matterintroduced into the space including the second signal wiring area 158 bmay be moved through the opening 541 b to the one area of the hingehousing 150 where the first foreign matter collection member 541 isdisposed (or applied) and the first detent structure 400 a is mounted.

The hinge housing 150 may further include a partition wall thatseparates the first signal wiring area 158 a and at least part of thesecond signal wiring area 158 b for, a partition wall disposed in atleast part of a space between the first signal wiring area 158 a and thesecond signal wiring area 158 b or a partition wall that divides thefirst signal wiring area 158 a and at least part of the second signalwiring area 158 b). An opening identical to the opening 541 b may beformed in the partition wall between the first signal wiring area 158 aand the second signal wiring area 158 b. Foreign matter introduced intothe first signal wiring area 158 a, may be moved to the second signalwiring area 158 b through the opening formed in the partition wall, andthe foreign matter introduced into the second signal wiring area 158 bmay be moved to the first foreign matter collection member 541 throughthe opening 541 b mentioned above and may be collected by the firstforeign matter collection member 541.

FIG. 14A illustrates another example of an arrangement, of foreignmatter collection members according to a second embodiment. FIG. 14B isa sectional view taken along line D-D′ of FIG. 14A.

Referring to FIGS. 14A and 14B, at least one of the foreign mattercollection members 541, 542, 543, and 544 may be disposed on at least apartial area of the inside of the hinge housing 150 on which the firstto fourth detent structures 400 a, 400 b, 400 c, and 400 d are mounted.At least one foreign matter collection patterns 157 a, 157 b, or 157 cmay be disposed on at least partial areas of the third inner surface 157of the hinge housing 150 on which the third hinge structure 300 ismounted. The foreign matter collection patterns 157 a, 157 b, and 157 cmay be partly disposed on the third inner surface 157 and may bedisposed on areas that do not affect hinge motion of the third hingestructure 300. As illustrated in FIG. 14B, the third hinge structure 300may include at least one gear. The foreign matter collection patterns157 a, 157 b, and 157 c may be disposed on areas other than the areawhere the gear and the third inner surface 157 face each other within apredetermined distance. For example, the third hinge structure 300 mayinclude the first main gear 1431, the second main gear 1432, the firstidle gear 1441, and the second idle gear 1442. The first foreign mattercollection pattern 157 a may be disposed on an area of the inside of thehinge housing 150 that corresponds to the area between the first maingear 1431 and the first idle gear 1441. The second foreign mattercollection pattern 157 b may be disposed on an area of the inside of thehinge housing 150 that corresponds to the area between the first idlegear 1441 and the second idle gear 1442. The third foreign mattercollection pattern 157 c may be disposed on an area of the inside of thehinge housing 150 that corresponds to the area between the second idlegear 1442 and the second main gear 1432. As illustrated, the foreignmatter collection patterns 157 a, 157 b, and 157 c have a predeterminedlength (e.g., the horizontal length of the third hinge structure 300with respect to FIG. 14A) in the horizontal axis direction of the hingehousing 150 and are arranged in a stripe form. However, the disclosureis not limited thereto. For example, the foreign matter collectionpatterns 157 a, 157 b, and 157 c may be formed in a dot type, or atleast a part thereof may be formed to be a curved line (or a curvedsurface).

In FIGS. 13, 14A and 14B, foreign matter collection patterns may bepartly disposed on at least partial areas of the first inner surface 159a and the second inner surface 159 b on which the first hinge structure200 a and the second hinge structure 200 b are mounted. For example,foreign matter collection patterns 200F and 200G may be disposed on theremaining areas of the first inner surface 159 a and the second innersurface 159 b other than the areas where the hinge brackets of the hingestructures 200 a and 200 b are opposite the hinge housing 150. Theforeign matter collection patterns 200F and 200G may include at leastone dot or at least one vertical stripe (e.g., a stripe facing adirection perpendicular to the lengthwise direction of the hinge housing150 with respect to FIG. 14A). A plurality of foreign matter collectionpatterns may be disposed on the first inner surface 159 a. For example,on the first inner surface 159 a, foreign matter collection patterns maybe disposed on one area of the hinge housing 150 that corresponds to aright edge of the first hinge structure 200 a and another area of thehinge housing 150 that corresponds to a left edge of the first hingestructure 200 a. Similar to the first inner surface 159 a, the secondinner surface 159 b may have a plurality of foreign matter collectionpatterns disposed thereon. Alternatively, foreign matter collectionpatterns may be disposed on only the right edge of the first innersurface 159 a and the left edge of the second inner surface 159 b.

The hinge housing 150 may include a partition wall 156 a that separatesthe second inner surface 159 b on which the second hinge structure 200 bis disposed and at least part of the area on which the fourth detentstructure 400 d is disposed (or, a partition wall 156 a disposed in atleast part of a space between the second inner surface 159 b on whichthe second hinge structure 200 b is disposed and the area on which thefourth detent structure 400 d is disposed or a partition wall 156 a thatdivides the second inner surface 159 b on which the second hingestructure 200 b is disposed and at least part of the area on which thefourth detent structure 400 d is disposed). The partition wall 156 a mayinclude an opening 156 b (or, a passage, hole, or recess) that connectsa space including the second inner surface 159 b and a space includingthe area on which the fourth detent structure 400 d is disposed. Foreignmatter introduced into the space including the second inner surface 159b may be moved to the fourth foreign matter collection member 544through the opening 156 b. Accordingly, the opening 156 b may be used tocollect, through the fourth foreign matter collection member 544,foreign matter introduced into the area of the hinge housing 150 aroundthe fourth foreign matter collection member 544, Similarly, the hingehousing 150 may include a partition wall that separates the first innersurface 159 a and at least part of the area where the first detentstructure 400 a is disposed, and the partition wall may include at leastone recess or hole that enables a movement of foreign matter between aspace including the first inner surface 159 a and a space including thearea where the first detent structure 400 ais disposed. The hingehousing 150 may further include a partition wall that separates a spaceincluding the third inner surface 157 and at least part of a spaceincluding the first signal wiring area 158 a, and the partition wall mayinclude an opening that enables a movement of foreign matter introducedinto the space including the first signal wiring area 158 a to the thirdinner surface 157.

As described above, the electronic device may not include, or mayminimally include, separate foreign matter collection members on theareas of the hinge housing 150 on which the hinge structures 200 a, 200b, and 300 that perform hinge motions are disposed, thereby minimizingcomponents that hamper the hinge motions. In addition, the electronicdevice may include foreign matter collection members on the other areasto support collecting foreign matter. Accordingly, the electronic devicemay minimize a movement of foreign matter and may suppress damage toparts by the foreign matter.

According to an embodiment, an electronic device may include a firsthousing, a second housing, a display disposed on the first housing andthe second housing, at least one hinge structure that connects the firsthousing and the second housing, a hinge housing hat surrounds at leastpart of the hinge structure, and at least one foreign matter collectionmember that is disposed on one side of the hinge structure and thatcollects foreign matter introduced into the electronic device. The atleast one hinge structure may include at least one bracket or at leastone gear used to rotate the first housing and the second housing, andthe electronic device may further include, on a surrounding area of theinside of the hinge housing that is opposite the at least one bracket orthe at least one gear, at least one foreign matter collection pattern157 a, 157 b, or 157 c used to collect the foreign matter.

The at least one hinge structure may include a first hinge structuredisposed at a left edge of the hinge housing, a second hinge structuredisposed at a right edge of the hinge housing, a third hinge structuredisposed in the center of the hinge housing, and at least one detentstructure disposed between the first hinge structure and the third hingestructure or between the second hinge structure and the third hingestructure. The at least one foreign matter collection member may bedisposed on the inside of the hinge housing on which the at least onedetent structure is mounted.

According to an embodiment, an electronic device may include a firsthousing, a second housing, a display disposed on the first housing andthe second housing, at least one hinge structure, that connects edges atwhich the first housing and the second housing meet when the display isin a flat state, at least one detent structure connected to the firsthousing and the second housing, a hinge housing in which at least partof the at least one hinge structure and at least part of the at leastone detent structure are mounted, and at least one foreign mattercollection member disposed on at least part of the inside of the hingehousing on which the at least one detent structure is mounted. A firstaxis about which the first housing rotates and a second axis about whichthe second housing rotates may be formed at positions spaced apartupward from a bottom surface of the display by a predetermined distance.

The hinge housing may include at least one partition wall disposedbetween a first area where at least part of the at least one hingestructure is disposed and a second area where at least part of the atleast one detent structure is disposed. The at least one partition wallmay include at least one opening that is used to move foreign matterintroduced into the first area, in which the at least one hingestructure is disposed, to the second area in which the at least onedetent structure is disposed.

The electronic device may further include at least one piece of signalwiring, at least part of which is disposed inside the hinge housing, theat least one piece of signal wiring connecting a first electroniccomponent disposed in the first housing and a second electroniccomponent disposed in the second housing, and a partition wall thatseparates an area of the hinge housing where the at least one piece ofsignal wiring is disposed and at least part of a surrounding area (or apartition wall disposed between the area of the hinge housing and thesurrounding area). The partition wall may include at least one passageused to move foreign matter introduced into the area of the hingehousing, in which the signal wiring is disposed, to the surroundingarea.

At least one foreign matter collection pattern may be partly or locallydisposed on at least a partial area of the hinge housing.

In the above description, at least one of the first and secondelectronic components may be at least one processor, at least onecamera, at least one display, at least one sensor, or at least onememory. The first electronic component and the second electroniccomponent may be implemented with the same component (e.g., both thefirst electronic component and the second electronic component beingprocessors), or different components (e.g., the first electroniccomponent being a processor and the second electronic component being adisplay or a memory).

Each module or program module may be composed of single entity or aplurality of entities, a part of the above-described sub-components maybe omitted, or other sub-components may be further included.Alternatively or additionally, after being integrated in one entity,some components (e.g., a module or a program module) may identically orsimilarly perform the function executed by each corresponding componentbefore integration. According to various embodiments, operationsexecuted by modules, program modules, or other components may beexecuted by a successive method, a parallel method, a repeated method,or a heuristic method, or at least one part of operations may beexecuted in different sequences or omitted. Other operations may beadded.

The electronic device including the hinge structure minimizesintroduction of foreign matter into the electronic device, suppresses amovement of introduced foreign matter in the electronic device, andthus, minimizes an influence of foreign matter on components in theelectronic device.

The disclosure may provide an electronic device having a structure forpreventing contact of foreign matter with a rear surface of a display ofthe electronic device.

Other aspects and effects provided by the hinge structure herein may berealized.

While the disclosure has been shown and described with reference tovarious embodiments thereof, it will be understood by those skilled inthe art that various changes in form and details may be made thereinwithout departing from the spirit and scope of the disclosure as definedby the appended claims and their equivalents.

What is claimed is:
 1. An electronic device comprising a first housing;a second housing; a display disposed on the first housing and the secondhousing; a first hinge plate coupled to the first housing; a secondhinge plate coupled to the second housing; and at least one hingestructure coupled to the first hinge plate and the second hinge plate,wherein the at least one hinge structure comprises: a center bracket, afirst hinge bracket coupled to the center bracket and configured torotate in a first direction, a second hinge bracket connected to thecenter bracket and configured to rotate in a second direction, and atleast one hole formed in the center bracket.
 2. The electronic device ofclaim 1, wherein at least a portion of the at least one hole is disposedunder the first hinge bracket or the second hinge bracket.
 3. Theelectronic device of claim 1, wherein the at least one hole includes: afirst hole and a second hole which are disposed under the first hingebracket when the display is in a flat state, and a third hole and afourth hole which are disposed under the second hinge bracket when thedisplay is in a flat state.
 4. The electronic device of claim 1, whereinthe at least one hole is formed through front and rear surfaces of thecenter bracket.
 5. The electronic device of claim 1, wherein the atleast one hole is vertically formed through at least parts ofsurrounding areas, and wherein the first hinge bracket and the secondhinge bracket are mounted in a first rail part and a second rail part ofthe center bracket.
 6. The electronic device of claim 1, wherein the atleast one hole is configured to enable foreign matter to move throughthe at least one hole.
 7. The electronic device of claim 6, wherein theforeign matter moves to a lower part of the at least one hinge structurethrough the at least one hole.
 8. The electronic device of claim 6,further comprising a hinge housing on which the center bracket ismounted, wherein the foreign matter moves between the hinge housing andthe at least one hinge structure.